HashList.H

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License
    This file is part of OpenFOAM.
 
    OpenFOAM is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
 
    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
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    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.
 
    You should have received a copy of the GNU General Public License
    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
 
Class
    Foam::HashList
 
Description
    HashList class. Like HashTable, but much less dynamic memory-y. Should be
    faster for small sets of non-dynamic primitive types (labels, edges,
    points, etc...). It is also much less functional at present. There is no
    re-sizing, so you have to make sure it is constructed sufficiently large to
    hold all the data that will ever be inserted into it.
 
SourceFiles
    HashList.C
 
\*---------------------------------------------------------------------------*/
 
#include "DynamicList.H"
#include "Tuple2.H"
#include "word.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#ifndef HashList_H
#define HashList_H
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
/*---------------------------------------------------------------------------*\
                          Class HashList Declaration
\*---------------------------------------------------------------------------*/
 
template<class Type, class Key=word, class Hash=string::hash>
class HashList
:
    private DynamicList<Tuple2<Key, Type>>
{
public:
 
    // Public Static Member Data
 
        //- Null key value for unset elements in the list
        static const Key nullKey;
 
 
    // Constructors
 
        //- Construct given a size
        HashList(const label size);
 
 
    // Member Functions
 
        //- The size of the underlying list
        inline label capacity() const;
 
        //- Clear all elements
        void clear();
 
        //- Resize and clear all elements
        void resizeAndClear(const label newSize);
 
        //- Insert into the hash list. Return true if the value was newly
        //  inserted, or false if it was already there.
        bool insert(const Key& k, const Type& t);
 
 
    // Member Operators
 
        //- Retrieve from the hash list
        const Type& operator[](const Key& k) const;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#ifdef NoRepository
    #include "HashList.C"
#endif
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //